Home / 1,989.85-2,980.67-1,165.62

Finding the Fourth Proportional to 1,989.85, 2,980.67 and 1,165.62

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Solution

The fourth proportional to 1,989.85, 2,980.67 and 1,165.62 is: 1,746.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.85 : 2,980.67 = 1,165.62 : x
  2. Step 2: Convert to fraction form
    1,989.85/2,980.67 = 1,165.62/x
  3. Step 3: Cross multiply
    1,989.85x = 2,980.67 × 1,165.62
  4. Step 4: Simplify right side
    1,989.85x = 3,474,342.66
  5. Step 5: Solve for x
    x = 3,474,342.66/1,989.85
  6. Step 6: Final answer
    x = 1,746.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.